If today knife fighting is finding more fertile training ground in other arts, it is not because Aikido cannot support it, but rather because institutionally Aikido has come to support other things over other things (unfortunately).

Richard Heckler and I were talking about how we were doing some paired knife work and our students (not all of them) had some resistance to it. To us it seemed fairly ridiculous to decide that paired sword was Aikido but paired knife wasn't.